SFP+ to RJ45 transceivers for YuanLey switch?

Snapshot · 4 Sep 2025 at 18:32

I have a new NAS with a 10GbE port and a YuanLey switch with two SFP+ ports plus eight 2.5GbE.
I've verified the NAS port runs at 10Gb/s by wiring it to the 10GbE port on my old Netgear switch. It also works at 2.5Gb/s when wired to a 2.5GbE port on the YuanLey.
I've verified both YuanLey SFP+ ports work by connecting them in turn via DAC cable to the SFP+ port on the Netgear.
I now want to connect the NAS to the YuanLey switch at 10Gb/s. I have two 10GbE SFP+ transceivers - one from 6COM for Netgear, used on my Netgear switch so known to be good and one from Qsefptek that says its for Cisco - neither of these will work with the YuanLey switch, the NAS just does not connect.

So has anyone found a SFP+ to RJ45 transceiver that works with these generic Chinese switches? Or any ideas on which target brand is likely to be compatible?

bledd · 4 Sep 2025 at 20:42

Lots of Chinese brand names being thrown around here.

I'd stick to major brands and use DAC everywhere. Mellanox connectx 4 cards in dac mode can save you around £25-40 a year in electricity compared to 10gbe cards. Plus less heat generated.

If you must use 10gbe, then the Mikrotik sfp+ to ETH adaptors seem pretty bullet proof.

Snapshot · 4 Sep 2025 at 23:08

You seem to have assumed that I've built the NAS so can change cards at will. This is not the case as it's a commercial unit so only your last suggestion is relevant. Thanks for that and I'll have a look at Microtik

the-evaluator · 5 Sep 2025 at 06:47

I like fs.com stuff, I haven't used their SFP+ to copper modules but I've got plenty of their branded SFP+ & QSFP28 modules in use and can't remember having one fail.

Bluecube · 5 Sep 2025 at 07:11

I’ve used 10Gtek SFP+ cables to connect a Ubiquiti switch to an Aoostar NAS with no issues. Can’t comment on their adapters though.

Armageus · 5 Sep 2025 at 07:16

Snapshot said:
You seem to have assumed that I've built the NAS so can change cards at will.

What make is the NAS then?

Another compatibility issue with SFP+ to RJ45 transceivers is that originally there were only 10Gb models, and it was only more recently that multi-rate (1/2.5/5/10) became a thing.

Assuming you actually have a decent Cat6a cable to link the two?

lmfy2k · 5 Sep 2025 at 12:13

Ive used fs.com ones before, they are good but do get very hot!

Avalon · 7 Sep 2025 at 01:05

The Yaunley kit I have (3 floor switches breaking out fiber to copper) are completely unfussy about modules, unlike my Aruba, I have used all sorts with them. 10Gtek were the last ones I ordered and they certainly work, as do the OM3 MMF AOC fiber patch leads from them.

Snapshot · 7 Sep 2025 at 07:35

Armageus said:
What make is the NAS then?

Another compatibility issue with SFP+ to RJ45 transceivers is that originally there were only 10Gb models, and it was only more recently that multi-rate (1/2.5/5/10) became a thing.

Assuming you actually have a decent Cat6a cable to link the two?

It's an Asustor. I admit to being an Asustor fanrinkli.....
The cable is only 0.5 metres and is fine at 2.5Gb/s (but what isn't?) but I will try another, especially given @Avalon's comments.
My 6Com adapter is 10Gb only but the other is multi-Gb.

Although, as others have noted, these adapters do run hot and I might just run a longer cable from the Netgear switch.